function [hasil hasil2] = euler3(f,f2,x0,y0,z0,b,h)
%EULER Fungsi menghitung nilai turunan dengan metode euler
%   
    n = (b-x0) /h;
    y = y0;
    x = x0;
    z = z0;
    syms a b c;
    for r=1:n
        y1 = y;
        y = y + h * subs(f,[a b c],[x y1 z]);
        z = z + h * subs(f2,[a b c],[x y1 z]);
        x = x + h;
    end
    hasil = y;
    hasil2 = z;
end

